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Full text of "Paper Crafts"

LED Pop-up Cards 



.1 



Make Projects 



build, hack, tweak, share, discover^ 



LED Pop-up Cards 

Written By: Karlee Tucker 



TOOLS: 



8-1/2x11 in. construction paper (1) 

CR2032 coin cell battery (1) 

Conductive Tape (1) 

Glue or glue stick, and clear tape (1) 

LEDs3V5mm(1) 

Markers (1) 

Scissors (1) 

Stencils (1) 



SUMMARY 

This project combines high-tech and low-tech materials to introduce the concept of "making" 
(technology on your time) to primary school students. 

The project has two parts. The first is "engineering" the design of a pop-up card. The second 
is adding light-emitting diodes (LEDs) to the design with a simple, safe, 3 -Volt battery to 
power them. 



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LED Pop-up Cards 



Step 1 — LED Pop-up Cards 






• Fold each piece of construction 
paper in half width-wise, and place 
one on top of the other. 



Step 2 




• Decide which piece will be the 
inside of the card. 



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LED Pop-up Cards 



Step 3 




• On the inner card, make two sets 
of short, parallel cuts along the fold 
line, each set placed evenly along 
the paper. 



Step 4 




• To achieve the ultimate pop-up 
effect, unfold the inner card that 
was just cut, and push the flaps in 
toward the center section of your 
construction paper, so that two 
paper "squares" pop out. When you 
close your card, you will find empty 
places on the outside of the paper. 
Opening your card will then give 
you the beginnings of the pop-up 
effect. 



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LED Pop-up Cards 



Step 5 




• Next, glue your second piece of construction paper to the back of the first, making sure 
the papers line up evenly. This second piece will cover the "empty" places that you just cut 
to create the pop-up effect. Once the gluing is complete, you can set the card to the side 
to dry. 



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LED Pop-up Cards 



Step 6 




• On a third piece of construction 
paper, create your desired design 
to host your circuit and LED — and 
be the pop-up design. Your design 
can be anything you want: a 
Christmas tree, a fish, a house, a 
robot. The choice is totally up to 
you; just make sure it fits inside of 
the card when closed. 

• Note: There is really no 
wrong place to put your LED 

and circuit. If you wish to have the 
background of your card light up, 
you would enclose the circuit in 
between your two pieces of 
construction paper before gluing 
them together, instead of your 
cutout design. For this example, 
however, the LED and circuit are 
placed on the pop-out design. 



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Page 5 of 14 



LED Pop-up Cards 



Step 7 




• When you are creating your 
enclosed, pop-up design, you will 
want to make sure that you don't 
make it too big! You will need to 
note the distance between where 
the end of the pop-up tab begins 
and where the bottom of the card 
ends. 

• You can also make designs 
easier for students by 

making tracers or stencils. All you 
would need is cardstock, thick 
paper, or recycled office folders. 



Step 8 




• To add the LEDs, first choose 
where to place the LEDs on the 
design-it doesn't matter where they 
go just as long as you have enough 
room to place your circuit on the 
back. Then poke the leads through 
the construction paper of the 
design. 



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LED Pop-up Cards 



Step 9 




• To prevent the leads from touching, 
make a separate hole for each 
lead. Turn the design over and fold 
the leads down flat. 

• Make sure the positive lead 
(the long end) is separated 
from the negative lead, & make 
sure the negative doesn't touch the 
positive & vice versa. If you have 
more than one LED in the circuit, 
group the positive & negative leads 
close to each other. If needed, add 
a piece of tape or mark the paper 
with a pencil where the positive 
lead is located. 



Step 10 






• Now create the circuit using copper tape. The positive and negative leads will need to 
reach each side of the battery. The copper tape serves to make that connection. 



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LED Pop-up Cards 



Step 11 




• Place small strips of copper tape 
individually under each lead. 



Step 12 




• Use a longer piece of copper tape 
under the leads farther away from 
the battery. Make sure the positive 
leads and the negative leads are 
grouped together and on separate 
sides from each other. 



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LED Pop-up Cards 



Step 13 




• Tape down the leads with more 
copper tape or regular Scotch tape 
so they lie flat. 



Step 14 




• In the next step, the negative and 
positive leads must connect to the 
negative and positive sides of the 
battery, respectively. For example, 
place the negative side of the 
battery down where the negative 
leads all meet so that the battery is 
touching them all. 

• Then, on the positive side of the 
battery (marked with the "+"), tape 
down a piece of copper tape facing 
down, hanging over the battery far 
enough to reach the group of 
positive leads. 



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LED Pop-up Cards 



Step 15 




• Because the glue on the back of 
the copper tape works as an 
insulator instead of a conductor, 
you will need to turn a piece of 
copper tape upside down & tape 
the smooth, non-glued side down. 
In this picture example, you can 
see the copper tape being taped to 
the positive side. There is extra 
copper to make the connection to 
the positive lead. 

• Now tape down your battery to the 
respective leads and make all 
necessary connections. 



Step 16 




• If everything is positioned correctly 
and the correct sides are touching 
the correct group of leads, the 
LEDs will light up. If not, consult 
the "Paving Bumps in the Road" 
section below. If it works, tape the 
battery in place with Scotch tape. 

• Voila! Your card/design should now 
light up! 



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LED Pop-up Cards 



Step 17 




• Glue your design (once it has been lit) to the inside of your card. 



Step 18 











1 











• Decorate as you see fit! This step 
can come at any point during your 
process. The background may be 
easier to decorate without the pop- 
up glued to the inside. 



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LED Pop-up Cards 



Step 19 




• Here are a few more examples! 



Step 20 




• When completing this project with 
students, it's always a great idea to 
let them play with and explore how 
the materials work, on their own. 
For example, give the students the 
LEDs and batteries without any 
explanation and challenge them to 
make the LED light up. 

• Let students make mistakes in how 
to align their LED leads. Show 
them how to use the battery to test 
which lead is positive. The positive 
lead is the one that is touching the 
+ side of the battery when the LED 
lights up, and it's also the longer 
lead on the LED. If it doesn't work, 
the leads may be reversed. 



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Page 12 of 14 



LED Pop-up Cards 
Hints: 

• When completing this project with students, it's always a great idea to let them play with and 
explore how the materials work, on their own. For example, give the students the LEDs and 
batteries and with out any explanation and challenge them to make the LED light up. 

• Let students make mistakes in how to align their LED leads. Show them how to use the battery 
to test which lead is positive. The positive lead is the one that is touching the + side of the 
battery when the LED lights up, and also the longer lead on the LED. If that doesn't work, the 
leads may be reversed. 

• Challenge the students to prevent a "short circuit." Tell them nothing from the positive side can 
EVER touch anything from the negative side. The tricky part is that this includes the battery, 
itself. When connecting the conductive copper tape to the top of the battery, it usually ends up 
touching the sides as well, leading to a short circuit unless an insulator is placed on the side to 
protect it. Hint: regular scotch tape can serve as both an insulator and a fastener to keep the 
battery attached to the card. 

Paving bumps in the road: 

So, when I decided to take on the task of creating an awesome pop-up Make Robot card, I came 
across a few bumps in the road. To make this project easy and simple for you, I am sharing 
those tricky spots with you in hopes that your project will go smoothly (especially if you are 
working with students). 

• Making tracers for designing the inside of the card can give students more direction when 
trying to figure out what to make. 

• With the design you have chosen, make sure that you aren't making it too big! You will want to 
measure from your card's bottom cut out (essentially from where you are gluing on your design 
to the edge of the bottom of your card). 

• When creating your circuit, you should note that the adhesive on the bottom of your copper 
tape could potentially cause your circuit to not work at all. It is working as an insulator and not a 
conductor. You will know this is the case after you double check to make sure no cross 
connections have been created (positive and negative leads touching, for example). To resolve 
this dilemma, take a piece of your copper tape with the adhesive cover still connected, and flip it 
upside down. Then, take a piece of scotch tape and tape the copper onto the lead. The adhesive 
side should be facing you. Then tape the other side of the copper tape on the battery. That 



© Make Projects www.makeprojects.com Page 13 of 14 



LED Pop-up Cards 
should do the trick! 

The original inspiration for awesome LED-spangled cards is http://pdxyoungmakers.com . You 
will find the PDF project under the "How To" category. There are many websites and books 
available on how to design simple and complex pop-up cards. For other pop-up card ideas visit 
Enchanted Learning . 

This document was last generated on 2012-11-03 01 :40:57 AM. 



© Make Projects www.makeprojects.com Page 14 of 14